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A highly ordered Meso@microporous carbon-supported Sulfur@smaller sulfur core-shell structured cathode for Li-s batteries

Journal Article


Abstract


  • For lithium-sulfur batteries, commercial application is hindered by the insulating nature of sulfur and the dissolution of the reaction intermediates of polysulfides. Here, we present an ordered meso-microporous core-shell carbon (MMCS) as a sulfur container, which combines the advantages of both mesoporous and microporous carbon. With large pore volume and highly ordered porous structure, the "core" promises a sufficient sulfur loading and a high utilization of the active material, while the "shell" containing microporous carbon and smaller sulfur acts as a physical barrier and stabilizes the cycle capability of the entire S/C composite. Such a S/MMCS composite exhibits a capacity as high as 837 mAh g-1 at 0.5 C after 200 cycles with a capacity retention of 80% vs the second cycle (a decay of only 0.1% per cycle), demonstrating that the diffusion of the polysulfides into the bulk electrolyte can be greatly reduced. We believe that the tailored highly ordered meso-microporous core-shell structured carbon can also be applicable for designing some other electrode materials for energy storage.

UOW Authors


  •   Li, Zhen (external author)
  •   Wu, Chao

Publication Date


  • 2014

Citation


  • Li, Z., Jiang, Y., Yuan, L., Yi, Z., Wu, C., Liu, Y., . . . Huang, Y. (2014). A highly ordered Meso@microporous carbon-supported Sulfur@smaller sulfur core-shell structured cathode for Li-s batteries. ACS Nano, 8(9), 9295-9303. doi:10.1021/nn503220h

Scopus Eid


  • 2-s2.0-84912542844

Web Of Science Accession Number


Start Page


  • 9295

End Page


  • 9303

Volume


  • 8

Issue


  • 9

Place Of Publication


Abstract


  • For lithium-sulfur batteries, commercial application is hindered by the insulating nature of sulfur and the dissolution of the reaction intermediates of polysulfides. Here, we present an ordered meso-microporous core-shell carbon (MMCS) as a sulfur container, which combines the advantages of both mesoporous and microporous carbon. With large pore volume and highly ordered porous structure, the "core" promises a sufficient sulfur loading and a high utilization of the active material, while the "shell" containing microporous carbon and smaller sulfur acts as a physical barrier and stabilizes the cycle capability of the entire S/C composite. Such a S/MMCS composite exhibits a capacity as high as 837 mAh g-1 at 0.5 C after 200 cycles with a capacity retention of 80% vs the second cycle (a decay of only 0.1% per cycle), demonstrating that the diffusion of the polysulfides into the bulk electrolyte can be greatly reduced. We believe that the tailored highly ordered meso-microporous core-shell structured carbon can also be applicable for designing some other electrode materials for energy storage.

UOW Authors


  •   Li, Zhen (external author)
  •   Wu, Chao

Publication Date


  • 2014

Citation


  • Li, Z., Jiang, Y., Yuan, L., Yi, Z., Wu, C., Liu, Y., . . . Huang, Y. (2014). A highly ordered Meso@microporous carbon-supported Sulfur@smaller sulfur core-shell structured cathode for Li-s batteries. ACS Nano, 8(9), 9295-9303. doi:10.1021/nn503220h

Scopus Eid


  • 2-s2.0-84912542844

Web Of Science Accession Number


Start Page


  • 9295

End Page


  • 9303

Volume


  • 8

Issue


  • 9

Place Of Publication